DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
X-ray of the knee joints in a 51 year old female patient showing bilateral (on both sides) osteoarthritis. The joint space has narrowed and there are bony spurs (osteophytes) in the joint. Osteoarthritis is a joint disorder caused by mechanical wear and tear of the joint.
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